Assembly comprising an articulation spindle supported by a clevis and immobilized in translation by a blocking device integrating a double anti-rotation system

Abstract

An assembly with an articulation spindle mounted in a first sleeve inserted into a first arm of a clevis and in a second sleeve inserted into a second arm of said clevis. The assembly comprises a blocking device. The blocking device comprises a nut screwed onto a threaded portion of an extension of the second sleeve and comprising an inner shoulder against which the second end of the articulation spindle can come to bear, a locking washer able to adopt a locked state in which it prevents the nut from rotating with respect to the extension and an unlocked state in which it allows the nut to be unscrewed, and a longilinear element able to adopt a locked state in which it passes through at least the nut so as to prevent it from rotating.

The invention claimed is: 
     
       1. An assembly comprising:
 an articulation spindle mounted in a first sleeve inserted into a first arm of a clevis and in a second sleeve inserted into a second arm of said clevis, said first sleeve comprising an inner shoulder which projects into said first sleeve and which acts as a stop for a first end of said articulation spindle, 
 a blocking device acting as a stop for a second end of said articulation spindle, the blocking device comprising:
 a nut screwed onto a threaded portion of an extension of the second sleeve and comprising an inner shoulder acting as a stop for the second end of the articulation spindle, 
 a locking washer able to adopt a locked state to prevent the nut from rotating with respect to the extension and an unlocked state to allow the nut to be unscrewed, 
 a longilinear element able to adopt a locked state in which the longilinear element passes through at least the nut and the articulation spindle so as to prevent the nut from rotating with respect to the articulation spindle and an unlocked state in which the longilinear element allows the nut to be unscrewed from the threaded portion of the extension, and, 
 
 wherein the articulation spindle further comprises at least one through hole for receiving the longilinear element. 
 
     
     
       2. The assembly as claimed in  claim 1 , wherein the locking washer comprises a circumference comprising a shape complementary with that of the nut, the complementary shape preventing the nut from rotating with respect to the extension in a first position corresponding to the locked state of the locking washer, and allowing the nut to rotate with respect to the extension in a second position, corresponding to the unlocked state of the locking washer. 
     
     
       3. The assembly as claimed in  claim 2 , wherein the nut comprises an outer surface with at least one longitudinal channel and wherein the circumference of the locking washer comprises at least one spur which is able to adopt a non-folded position in which the spur does not interfere with a longitudinal channel of the nut and allows the nut to move in rotation, and a folded position in which the spur is housed in a longitudinal channel of the nut and prevents said nut from rotating. 
     
     
       4. The assembly as claimed in  claim 1 , wherein the locking washer comprises an orifice having a shape which is complementary with that of the extension of the second sleeve so as to allow the locking washer to move in translation on the extension and to prevent the locking washer from rotating with respect to the extension in the locked state of the locking washer. 
     
     
       5. The assembly as claimed in  claim 4 , wherein the extension comprises an outer surface with at least one longitudinal channel and wherein the locking washer comprises at least one spur configured to be housed in a longitudinal channel of the extension. 
     
     
       6. The assembly as claimed in  claim 1 , further comprising at least one compensation washer interposed between the locking washer and the second arm of the clevis. 
     
     
       7. An assembly comprising:
 an articulation spindle mounted in a first sleeve inserted into a first arm of a clevis and in a second sleeve inserted into a second arm of said clevis, said first sleeve comprising an inner shoulder which projects into said first sleeve and which acts as a stop for a first end of said articulation spindle, 
 a blocking device acting as a stop for a second end of said articulation spindle, the blocking device comprising:
 a nut screwed onto a threaded portion of an extension of the second sleeve and comprising an inner shoulder acting as a stop for the second end of the articulation spindle, 
 a locking washer able to adopt a locked state to prevent the nut from rotating with respect to the extension and an unlocked state to allow the nut to be unscrewed, 
 
 a longilinear element able to adopt a locked state in which the longilinear element passes through at least the nut and the articulation spindle so as to prevent the nut from rotating with respect to the articulation spindle and an unlocked state in which the longilinear element allows the nut to be unscrewed from the threaded portion of the extension, and, 
 wherein the locking washer comprises an orifice having a shape which is complementary with that of the extension of the second sleeve so as to allow the locking washer to move in translation on the extension and to prevent the locking washer from rotating with respect to the extension in the locked state of the locking washer, and, 
 wherein the extension comprises an outer surface with at least one longitudinal channel and wherein the locking washer comprises at least one spur configured to be housed in a longitudinal channel of the extension. 
 
     
     
       8. The assembly as claimed in  claim 7 , wherein the locking washer comprises a circumference comprising a shape complementary with that of the nut, the complementary shape preventing the nut from rotating with respect to the extension in a first position corresponding to the locked state of the locking washer, and allowing the nut to rotate with respect to the extension in a second position, corresponding to the unlocked state of the locking washer. 
     
     
       9. The assembly as claimed in  claim 8 , wherein the nut comprises an outer surface with at least one longitudinal channel and wherein the circumference of the locking washer comprises at least one spur which is able to adopt a non-folded position in which the spur does not interfere with a longitudinal channel of the nut and allows the nut to move in rotation, and a folded position in which the spur is housed in a longitudinal channel of the nut and prevents said nut from rotating. 
     
     
       10. The assembly as claimed in  claim 7 , further comprising at least one compensation washer interposed between the locking washer and the second arm of the clevis. 
     
     
       11. An assembly comprising:
 an articulation spindle mounted in a first sleeve inserted into a first arm of a clevis and in a second sleeve inserted into a second arm of said clevis, said first sleeve comprising an inner shoulder which projects into said first sleeve and which acts as a stop for a first end of said articulation spindle, 
 a blocking device acting as a stop for a second end of said articulation spindle, the blocking device comprising:
 a nut screwed onto a threaded portion of an extension of the second sleeve and comprising an inner shoulder acting as a stop for the second end of the articulation spindle, 
 a locking washer able to adopt a locked state to prevent the nut from rotating with respect to the extension and an unlocked state to allow the nut to be unscrewed, 
 
 a longilinear element able to adopt a locked state in which the longilinear element passes through at least the nut and the articulation spindle so as to prevent the nut from rotating with respect to the articulation spindle and an unlocked state in which the longilinear element allows the nut to be unscrewed from the threaded portion of the extension, 
 wherein the articulation spindle comprises a central part, a second portion at its second end which is separated from the central part by a shoulder which is able to bear against the inner shoulder of the nut, the articulation spindle further comprising at least one through hole for receiving the longilinear element. 
 
     
     
       12. The assembly as claimed in claim,  11  wherein the through hole extends along a diameter of the articulation spindle and has an oblong cross section. 
     
     
       13. The assembly as claimed in  claim 12 , wherein the nut comprises at least one pair of orifices arranged in a transverse plane, the orifices of each pair being aligned along a diameter of the nut. 
     
     
       14. The assembly as claimed in  claim 13 , wherein the articulation spindle comprises a central part, a first portion at its first end, the first portion and the inner shoulder of the first sleeve having complementary shapes so as to prevent the articulation spindle from rotating with respect to the first sleeve when the first portion is introduced into the inner shoulder. 
     
     
       15. The assembly as claimed in  claim 12 , wherein the articulation spindle comprises a central part, a first portion at its first end, the first portion and the inner shoulder of the first sleeve having complementary shapes so as to prevent the articulation spindle from rotating with respect to the first sleeve when the first portion is introduced into the inner shoulder. 
     
     
       16. The assembly as claimed in  claim 11 , wherein the articulation spindle comprises a central part, a first portion at its first end, the first portion and the inner shoulder of the first sleeve having complementary shapes so as to prevent the articulation spindle from rotating with respect to the first sleeve when the first portion is introduced into the inner shoulder. 
     
     
       17. The assembly as claimed in  claim 11 , wherein the locking washer comprises a circumference comprising a shape complementary with that of the nut, the complementary shape preventing the nut from rotating with respect to the extension in a first position corresponding to the locked state of the locking washer, and allowing the nut to rotate with respect to the extension in a second position, corresponding to the unlocked state of the locking washer. 
     
     
       18. The assembly as claimed in  claim 11 , wherein the nut comprises an outer surface with at least one longitudinal channel and wherein the circumference of the locking washer comprises at least one spur which is able to adopt a non-folded position in which the spur does not interfere with a longitudinal channel of the nut and allows the nut to move in rotation, and a folded position in which the spur is housed in a longitudinal channel of the nut and prevents said nut from rotating.